Platinum Dissolution in Nitrogen Oxides-Containing HClO 4 Solution Studied by Electrochemical Quartz Crystal Microbalance

Platinum (Pt) dissolution has been elucidated by measuring a mass loss of Pt black-deposited Au quartz resonators in 0.1 mol dm-3 HClO4 containing NaNO2. A continuous weight loss of ca. 50 ng cm-2 cycle-1 was detected at [NaNO2] = 0.01 mol dm-3 under the potential cycling between 0.6 and 1.4 V vs. R...

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Bibliographic Details
Published in:ECS transactions 2013-03, Vol.50 (2), p.1607-1612
Main Authors: Kuroe, Hironori, Morita, Takafumi, Uchiyama, Yuki, Abe, Tomohiro, Imabayashi, Shin-ichiro
Format: Article
Language:English
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Summary:Platinum (Pt) dissolution has been elucidated by measuring a mass loss of Pt black-deposited Au quartz resonators in 0.1 mol dm-3 HClO4 containing NaNO2. A continuous weight loss of ca. 50 ng cm-2 cycle-1 was detected at [NaNO2] = 0.01 mol dm-3 under the potential cycling between 0.6 and 1.4 V vs. RHE. The magnitude of Pt dissolution depends on the concentration of NaNO2 and the range of potential cycling. The average mass loss decreases to 5~10 ng cm-2 cycle-1 at [NaNO2] = 1 mmol dm-3. The Pt dissolution occurs when the higher potential limit is more than 1.0 V vs. RHE and the lower potential limit is less than 0.9 V vs. RHE, suggesting that the reduction of Pt oxide in the presence of NaNO2 in the bulk solution contributes to the dissolution.
ISSN:1938-5862
1938-6737
DOI:10.1149/05002.1607ecst